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Knauf Dritherm Cavity Slab 37 100mm 455 X 1200mm 6.55m2 Pack Knauf DriTherm Cavity Slab 37 is a water-repellent Glass Mineral Wool slab, designed for use in external full-fill masonry cavity walls, that offers excellent thermal performance. It is non-combustible with the best possible Euroclass A1 reaction to fire classification, and is manufactured using Knauf [...]